It appears that you may be having an issue with the skin on your penis. Irritation, infection, or inflammation can cause redness and pain. Some common signs are itching, burning sensation and tenderness. Do not use rough soaps or chemicals in this area. Keep it dry and clean always. If these signs continue or becomes severe, seek medical advice immediately.

It is crucial if you have a rash on your penis to consult a dermatologist or a doctor who specializes in the urinary tract as soon as possible. It might turn out to be an ingrown hair but you might be prone to a sexually transmitted disease.

Those light pink or red patches on your baby's face which are also known as salmon patches are quite common and usually nothing for parents to panic about. They occur when small blood vessels are near the skin. No need for treatment as they usually disappear on their own by the time the child is 1 to 2 years. Simply keep the area clean and protect against direct sunlight. 

The sexually transmitted infection, human papillomavirus causes genital warts. Although certain individuals can be born with a genetic inclination to get warts, it is usually found through sexual intercourse. Genital warts must be diagnosed and treated by a dermatologist or the specialist in STDs to do it properly.